Surface Water Flood Maps (FRM_FH_SURFACE_WATER_EXTENT_L)

The following probabilities are available for surface water flooding: - High - 10 year return period - Medium - 200 year return period - Low - 200 year return period plus climate change using the UKCP09 high emissions scenario for the 2080s.The surface water hazard maps show (where available): - Flood extent - Flood depth - Flood velocities where appropriate. The climate change scenario has been defined by United Kingdom Climate Projection 2009 (UKCP09) predictions for 2080 high emissions 95%ile predictions. Medium and low probability flood events were selected for consistency with return periods used in Scottish Planning Policy, whereas the high probability was chosen as it is reflective of observed events experienced over the last few decades.本次数据集涵盖的地表积水洪涝（surface water flooding）概率等级及对应条件如下： - 高概率：10年一遇重现期 - 中概率：200年一遇重现期 - 低概率：200年一遇重现期叠加2080年代采用英国气候预测2009（UKCP09）高排放情景的气候变化影响 地表洪涝灾害风险图可展示以下内容（若有对应数据）： - 淹没范围 - 淹没水深 - 适宜场景下的淹没流速 本次研究采用的气候变化情景，基于英国气候预测2009（UKCP09）针对2080年代高排放情景的95%分位数预测结果设定。 中、低概率洪涝事件的选取标准与《苏格兰规划政策》中采用的重现期规范保持一致，而高概率事件的选取则贴合近数十年来实际观测到的洪涝灾害事件特征。